JPH0717939Y2 - Disappearance automatic digestion gas burner - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a self-extinguishing automatic fire extinguishing gas burner.

[Prior Art] Conventionally, as an extinguishing automatic fire extinguishing gas burner, a thermocouple 2 is disposed near the gas burner main body 1, and an electromotive force of the thermocouple 2 intervenes in the middle of a gas supply path to the gas burner main body 1 Those that can open and close (not shown) have become widespread.

That is, in this conventional example, a manual push cock (not shown)
When igniting the gas burner body 1 with, even after the gas burner body 1 is ignited, continue to push the manual pushing cock,
The manual push cock holds the open state until the thermocouple 2 generates sufficient electromotive force, and when the thermocouple 2 is heated until it has sufficient electromotive force to hold the solenoid valve in the open state, the manual push cock is pushed. It is designed to be operated so that the cock is released. If the gas burner body 1 goes out for some reason while it is in use, the thermocouple 2 will not cool enough and will not have enough electromotive force to hold the solenoid valve open, and the solenoid valve will close and automatically extinguish. ing.

[Problems to be Solved by the Invention] A large number of the conventional extinguishing automatic fire extinguishing gas burners are actually manufactured, and the technology thereof has been established to have sufficient reliability.

However, there is still a problem regarding the balance between operability and safety.

That is, when safety is important, the thermocouple 2
It is desirable to set a long time until the electromotive force has a predetermined electromotive force, in other words, to set a high temperature condition in which the thermocouple 2 has a predetermined electromotive force. Specifically, 100 ℃
If the solenoid valve operates at 1000 ° C rather than when it goes out, if the extinguishing occurs, the time for cooling the thermocouple 2 to 1000 ° C is naturally shorter than the time for cooling it to 100 ° C. Therefore, it is possible to provide an extinguishing automatic fire extinguishing gas burner that has a short time until extinguishing, that is, a short response time.

However, if the temperature condition of the thermocouple 2 is set high with an emphasis on safety, the time during which the manual push cock is pushed with the fingertip becomes long and the operability is deteriorated.

Further, the gas burner is not always used in a state in which the size of the flame is always constant, and as a result, it is inevitable that there is a difference in response time between when the flame is small and when the flame is large. When is small, the time until the thermocouple cools is short and the response time is fast, but when the flame is large, that is, when the gas outflow is large, the thermocouple 2 is overheated and the response time is long. This tends to be unfavorable for safety.

Further, in the conventional apparatus, the gas burner body 1 is provided with a recessed portion 1a as shown most clearly in FIG.
A thermocouple 2 is fixed in contact therewith. The reason why the thermocouple 2 is fixed in contact with the gas burner main body 1 is that the thermocouple 2 is brought as close as possible to the flame so that even a small flame can respond with certainty. As a result, the gas burner main body with a large heat storage capacity is obtained. When 1 is heated, even if extinguishing occurs, there is a drawback that the cooling time of the thermocouple 2 becomes longer due to the residual heat of the gas burner body 1 and the response time becomes longer.

For the above reasons, in reality, in a gas stove for a kitchen, the solenoid valve will not operate with the electromotive force of the thermocouple 2 unless the manual push cock is held open for 10 to 15 seconds.
It has the drawback that the solenoid valve does not close automatically within ~ 40 seconds, and in a burner with a large gas flow such as a bath kettle, it has the drawback that both times will be longer, and operability is poor for general consumers. Has been pointed out.

"Purpose" Therefore, the present invention has been made in view of the above-mentioned drawbacks, and an object thereof is to provide an extinguishing automatic fire extinguishing gas burner which has a short response time and is not affected by the size of the flame.

[Means for Solving the Problems] In order to solve the above problems, the thermocouple 2 is arranged near the gas burner main body 1 in order to solve the above-mentioned problems. I installed this thermocouple 2
In the extinguishing automatic fire extinguishing gas burner which opens and closes the electromagnetic valve interposed in the gas supply path to the gas burner main body 1 by the electromotive force of 1, the holder 3 of the thermocouple 2 is attached to the fixing member such as the gas burner main body 1 When the holder 3 and the heating power adjusting lever 4 are moved so as to move toward and away from the gas burner main body 1 and the heating power adjusting lever 4 is moved in a direction to increase the heating power, the thermocouple 2 moves away from the gas burner main body 1. The technical means is characterized in that the thermocouple 2 is connected by an interlocking mechanism member 5 that moves so as to approach the gas burner body 1 when the heating power adjusting lever 4 is moved in a direction to reduce the heating power.

[Operation] Therefore, in the automatic extinguishing gas burner of the present invention, the thermocouple 2 is located near the gas burner body 1 when the flame is small, and is located far from the gas burner body 1 when the flame is large. And, since this condition is the same during ignition and during the use of gas, even if the flame is ignited in a small flame state, the flame does not come into contact with the thermocouple 2 and the manual pushing cock is not pushed. The time that cannot occur can be shortened. Further, when the extinguishing occurs, the thermocouple 2 is located far from the gas burner body 1 when the flame is large, so that the response time is short and the solenoid valve is closed without being affected by the heat storage of the gas burner body 1. In addition, if the extinguishing occurs in a usage state with a small flame, the response time becomes long due to the heat storage of the gas burner body 1, but the operation in this case is the same as the conventional one and the amount of gas leakage is small, so for safety There is no problem.

That is, the automatic fire-extinguishing gas burner of the present invention can control the solenoid valve that opens and closes the gas supply to the gas burner body 1 depending on whether or not the flame contacts the thermocouple 2, and the response time can be shortened to the maximum. Actually, if the response time is set to zero, even if the wind shakes the flame, it will be judged as extinguished and automatic fire extinguishing will be performed. However, if the thermocouple 2 itself and the holder 3 of the thermocouple have a certain amount of heat storage capacity, the response time can be arbitrarily set.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a gas burner main body, a thermocouple 2 is arranged near the gas burner main body 1, and an electromotive force of the thermocouple 2 opens and closes a solenoid valve interposed in the gas supply path to the gas burner main body 1. It is the same as the conventional one.

According to the present invention, the holder 3 of the thermocouple 2 is held by the fixing member such as the gas burner body 1 so as to be movable in the contacting and separating directions with respect to the gas burner body 1.

That is, the thermocouple 2 is conventionally fixed to the gas burner body 1 or the like, but in the present invention, the thermocouple 2 is attached to the holder 3.
It is characterized in that it is held so as to be movable in the contact and separation directions with respect to the gas burner main body 1. As a concrete structure of this holding, in the illustrated example, the arm portion 3a of the holder 3 of the thermocouple 2 is pivotally attached to the gas burner main body 1 by the shaft 31, and the holder 3 is centered on the shaft 31. Although the thermocouple 2 is configured to move in the contact and separation directions with respect to the gas burner main body 1 by rotating, the holder 3 does not necessarily need to be pivotally attached to the gas burner main body 1 and is omitted in the drawing.
By disposing the sliding guide portion at a fixed portion, the holder 3 is guided by the sliding guide portion and is held so as to be movable in the contact and separation directions with respect to the gas burner main body 1, and the like, which is conventionally known means. Good.

When the holder 3 and the heat power adjusting lever 4 are moved in the direction to increase the heat power, the thermocouple 2 moves away from the gas burner body 1, and the heat power adjusting lever 4 is moved in the direction to decrease the heat power. Interlocking mechanism member 5 for moving the thermocouple 2 so as to approach the gas burner body 1
It is connected with.

In the illustrated example, the interlocking mechanism member 5 that connects the holder 3 and the heat power adjusting lever 4 utilizes the rotation of the air amount adjusting plate 6 rotated by the heat power adjusting lever 4, and the tip of the heat power adjusting lever 4 is used. One end of the first lever 51 is also engaged in the engagement cut groove 61 of the air amount adjusting panel 6 into which is engaged. The intermediate portion of the first lever 51 is pivotally attached to the first fixing base 7a by a shaft 52, and the other end of the first lever 51 is pivotally attached to one end of a second lever 53 by a shaft 54. Furthermore, this second lever 53
Has its intermediate portion pivotally attached to another portion of the first fixing base 7a by a shaft 55, and has one end of the third lever 56 and the shaft 57 on the other end side.
It is pivotally connected with. The third lever 56 has an elongated hole 58 in an intermediate portion thereof, and the second fixing base 7b (a different portion of the first fixing base 7a may be used) is formed in the elongated hole 58. When the installed pin 7c is inserted and the firepower adjustment lever 4 is rotated,
The third lever 56 is configured to move substantially in the longitudinal direction via the air amount adjusting board 6, the first lever 51, and the second lever 53. Furthermore, the tip of the third lever 56 is a claw.
59 is projected, and the tip of this claw 59 is engaged in an elongated hole 3b provided on the other end side (the side opposite to the shaft 31) of the holder 3.

That is, in the illustrated embodiment, when the heat power adjusting lever 4 is moved to the right as shown by an arrow P1 in order to increase the flame, the air amount adjusting plate 6 is rotated right, and one end of the first lever 51 (second (Bottom end of the figure) rotates to the left as shown by arrow P2,
The other end side (upper end side in FIG. 2) of the second lever 53 rotates to the right as indicated by arrow P3, and as a result, the third lever 56 moves to the right and the holder 3 moves around the shaft 31 as an arrow. As shown by P4, it rotates to the left and the thermocouple 2 moves away from the gas burner body 1. It should be noted that even if the third lever 56 moves substantially in the longitudinal direction, this does not mean that the third lever 56 moves in a strict linear direction. Further, since the holder 3 pivotally attaches one end, the other end of the third lever 56 does not move. The holder 3 and the holder 3 are smoothly linked by the connection of the claw 59 and the long hole 3b, not by pivotal attachment. Further, the illustrated embodiment has been described with an example in which the heat power adjusting lever 4 is moved in the direction of the arrow P1 when increasing the flame, but in the opposite case, a lever similar to the second lever 53 is further interposed, The second lever 53 may be omitted and the other end of the first lever 51 may be extended and pivotally attached to one end of the third lever 56. In short, the interlocking mechanism member 5 moves the thermocouple 2 away from the gas burner main body 1 when the thermal power adjusting lever 4 is moved in the direction of increasing the thermal power, and the thermocouple 2 is moved when the thermal power adjusting lever 4 is moved in the direction of decreasing the thermal power. As long as it moves so as to approach 1, it is not limited to the link mechanism by the lever as shown in the illustrated example, but it may be guided by a pulley to move in the middle of the loop of the rope that is rotated by the movement of the heat adjustment lever 4. A conventionally known interlocking mechanism member such as being fixed to the holder 3 may be used.

[Advantage of the Invention] The present invention is as described above. When the flame is small, the thermocouple 2 approaches the gas burner main body 1, and when the flame is large, the thermocouple 2 moves away from the gas burner main body 1.
It is possible to provide a self-extinguishing automatic fire extinguishing gas burner which has a good operability and can set the time until the electromotive force has a sufficient electromotive force and the time when the electromotive force becomes a predetermined value or less after extinguishing the extinguishing gas. That is, in the conventional technique, the performance of the thermocouple 2 itself is sufficiently improved, and it becomes possible to generate a large electromotive force even at a relatively low temperature. However, if it is set to detect the flame with a slight temperature rise and open the solenoid valve, the operability during ignition will be improved, but the time from the occurrence of extinguishing to the closing of the solenoid valve will be longer, and the amount of leaked gas will be reduced. In the case of the present invention, since the thermocouple 2 is moved according to the size of the flame, a predetermined electromotive force can be obtained regardless of the size of the flame, and the response time of the extinguishing ground is set to be short not only at the time of ignition. Therefore, it is possible to provide a self-extinguishing automatic fire extinguishing gas burner satisfying both safety and operability, which are contradictory to each other.

Another feature of the present invention that cannot be overlooked is that the effect of residual heat due to heating of the gas burner body 1 is weakened. If the gas is used in a large flame and the burner body 1 is extinguished when it is overheated, the thermocouple 2 will not cool for a while and the solenoid valve will continue to open, increasing the amount of gas leakage, In the present invention, since the thermocouple 2 can be separated from the gas burner main body 1, when the flame is large and the thermocouple 2 is used in a state where the thermocouple 2 is separated from the gas burner main body 1, the burner main body 1 is overheated. Even if it is, thermocouple 2
It is possible to provide an automatic fire extinguishing gas burner which is less affected by the gas burner body 1 and cools in a short time and closes the solenoid valve in a short time.

[Brief description of drawings]

FIG. 1 is a side view of an essential part showing an embodiment of an automatic extinguishing gas burner of the present invention, and FIG. 2 is a plan view of an example of an interlocking mechanism member used in the present invention. 1 ... Gas burner body, 2 ... Thermocouple, 3 ... Holder, 4 ... Thermal power adjustment lever, 5 ... Interlocking mechanism member

Claims (1)

[Scope of utility model registration request] 1. A thermocouple 2 is disposed near the gas burner main body 1, and an electromotive force of the thermocouple 2 opens and closes a solenoid valve interposed in the gas supply passage to the gas burner main body 1. In an automatic fire extinguishing gas burner, a holder 3 of a thermocouple 2 is held by a fixing member such as the gas burner main body 1 so as to be movable in a contacting and separating direction with respect to the gas burner main body 1, and the holder 3 and the heat power adjusting lever 4 are The thermocouple 2 moves away from the gas burner main body 1 when the thermal power adjusting lever 4 is moved in the direction of increasing the thermal power, and the thermocouple 2 moves so as to approach the gas burner main body 1 when the thermal power adjusting lever 4 is moved in the direction of reducing the thermal power. A self-extinguishing automatic fire extinguishing gas burner characterized by being connected by an interlocking mechanism member 5.